/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.skatiger.jrove.el;

import java.lang.reflect.Method;

import javax.el.FunctionMapper;

public final class CompositeFunctionMapper extends FunctionMapper {

    private final FunctionMapper fn0;

    private final FunctionMapper fn1;

    public CompositeFunctionMapper(FunctionMapper fn0, FunctionMapper fn1) {
        this.fn0 = fn0;
        this.fn1 = fn1;
    }

    /**
     * @see javax.el.FunctionMapper#resolveFunction(java.lang.String,
     *      java.lang.String)
     */
    @Override
    public Method resolveFunction(String prefix, String name) {
        Method m = this.fn0.resolveFunction(prefix, name);
        if (m == null) {
            return this.fn1.resolveFunction(prefix, name);
        }
        return m;
    }

}
